diff --git a/usr/local/share/bastille/common.sh b/usr/local/share/bastille/common.sh
index 1220fb20..3ef2aeda 100644
--- a/usr/local/share/bastille/common.sh
+++ b/usr/local/share/bastille/common.sh
@@ -38,7 +38,7 @@ enable_color() {
 }
 
 # If "NO_COLOR" environment variable is present, disable output colors.
-if ! export | grep -q "NO_COLOR"; then
+if [ -z "${NO_COLOR}" ]; then
     enable_color
 fi